The Ethereals are a fictional race of alien beings in the PC game X-COM: UFO Defense. As the masterminds behind the alien invasion, they are among the most powerful creatures in the game, and appear as hooded brown-robed humanoids, similar to monks. They carry weapons and use them, but all Ethereals are endowed with offensive psionic abilities.

Ethereal is a demo, released by the Italian gothic metal band Lacuna Coil in 1996. Ethereal was the first name of the band, as well; but seeing as there was a name clash with a Greek band called Ethereal, the band changed their name.